An idiomatic C++ client library for theCloud Identity-Aware Proxy API, a service to control access to applications running on Google Cloud Platform.
While this library isGA, please note Google Cloud C++ client libraries donotfollowSemantic Versioning.
Quickstart
The following shows the code that you'll run in thegoogle/cloud/iap/quickstart/directory, which should give you a taste of the Cloud Identity-Aware Proxy API C++ client library API.
#include "google/cloud/iap/v1/identity_aware_proxy_o_auth_client.h"
#include "google/cloud/project.h"
#include <iostream>
int main(int argc, char* argv[]) try {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " project-id\n";
return 1;
}
namespace iap = ::google::cloud::iap_v1;
auto client = iap::IdentityAwareProxyOAuthServiceClient(
iap::MakeIdentityAwareProxyOAuthServiceConnection());
google::cloud::iap::v1::ListBrandsRequest request;
request.set_parent(google::cloud::Project(argv[1]).FullName());
// ListBrands is not paginated, a single response includes all the "brands".
auto response = client.ListBrands(request);
if (!response) throw std::move(response).status();
std::cout << response->DebugString() << "\n";
return 0;
} catch (google::cloud::Status const& status) {
std::cerr << "google::cloud::Status thrown: " << status << "\n";
return 1;
}
Main classes
This library offers multiple*Clientclasses, which are listed below. Each one of these classes exposes all the RPCs for a gRPCserviceas member functions of the class. This library groups multiple gRPC services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.
The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the*Clientclasses when testing your application.
The library automatically retries requests that fail with transient errors, and usesexponential backoffto backoff between retries. Application developers can override the default policies.
More Information
Error Handling- describes how the library reports errors.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis page provides documentation for the Cloud Identity-Aware Proxy API C++ client library, which is currently in GA status but does not follow semantic versioning.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate version is 2.37.0-rc, and the page lists several previous versions of the library, down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe library includes multiple client classes, such as \u003ccode\u003eIdentityAwareProxyAdminServiceClient\u003c/code\u003e and \u003ccode\u003eIdentityAwareProxyOAuthServiceClient\u003c/code\u003e, each providing access to the RPCs for a gRPC service.\u003c/p\u003e\n"],["\u003cp\u003eThe library automatically retries requests with transient errors, using exponential backoff, but also allows developers to override these default policies.\u003c/p\u003e\n"],["\u003cp\u003eThe page also includes links for error handling, overriding the default endpoint, overriding the authentication credentials, and environment variable configurations.\u003c/p\u003e\n"]]],[],null,["Version 2.12.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/iap/latest)\n- [2.41.0](/cpp/docs/reference/iap/2.41.0)\n- [2.40.0](/cpp/docs/reference/iap/2.40.0)\n- [2.39.0](/cpp/docs/reference/iap/2.39.0)\n- [2.38.0](/cpp/docs/reference/iap/2.38.0)\n- [2.37.0](/cpp/docs/reference/iap/2.37.0)\n- [2.36.0](/cpp/docs/reference/iap/2.36.0)\n- [2.35.0](/cpp/docs/reference/iap/2.35.0)\n- [2.34.0](/cpp/docs/reference/iap/2.34.0)\n- [2.33.0](/cpp/docs/reference/iap/2.33.0)\n- [2.32.0](/cpp/docs/reference/iap/2.32.0)\n- [2.31.0](/cpp/docs/reference/iap/2.31.0)\n- [2.30.0](/cpp/docs/reference/iap/2.30.0)\n- [2.29.0](/cpp/docs/reference/iap/2.29.0)\n- [2.28.0](/cpp/docs/reference/iap/2.28.0)\n- [2.27.0](/cpp/docs/reference/iap/2.27.0)\n- [2.26.0](/cpp/docs/reference/iap/2.26.0)\n- [2.25.1](/cpp/docs/reference/iap/2.25.1)\n- [2.24.0](/cpp/docs/reference/iap/2.24.0)\n- [2.23.0](/cpp/docs/reference/iap/2.23.0)\n- [2.22.1](/cpp/docs/reference/iap/2.22.1)\n- [2.21.0](/cpp/docs/reference/iap/2.21.0)\n- [2.20.0](/cpp/docs/reference/iap/2.20.0)\n- [2.19.0](/cpp/docs/reference/iap/2.19.0)\n- [2.18.0](/cpp/docs/reference/iap/2.18.0)\n- [2.17.0](/cpp/docs/reference/iap/2.17.0)\n- [2.16.0](/cpp/docs/reference/iap/2.16.0)\n- [2.15.1](/cpp/docs/reference/iap/2.15.1)\n- [2.14.0](/cpp/docs/reference/iap/2.14.0)\n- [2.13.0](/cpp/docs/reference/iap/2.13.0)\n- [2.12.0](/cpp/docs/reference/iap/2.12.0)\n- [2.11.0](/cpp/docs/reference/iap/2.11.0) \n\nCloud Identity-Aware Proxy API C++ Client Library\n=================================================\n\nAn idiomatic C++ client library for the [Cloud Identity-Aware Proxy API](https://cloud.google.com/iap), a service to control access to applications running on Google Cloud Platform.\n\nWhile this library is **GA** , please note Google Cloud C++ client libraries do **not** follow [Semantic Versioning](https://semver.org/).\n\n### Quickstart\n\nThe following shows the code that you'll run in the `google/cloud/iap/quickstart/` directory, which should give you a taste of the Cloud Identity-Aware Proxy API C++ client library API. \n\n #include \"google/cloud/iap/v1/identity_aware_proxy_o_auth_client.h\"\n #include \"google/cloud/project.h\"\n #include \u003ciostream\u003e\n\n int main(int argc, char* argv[]) try {\n if (argc != 2) {\n std::cerr \u003c\u003c \"Usage: \" \u003c\u003c argv[0] \u003c\u003c \" project-id\\n\";\n return 1;\n }\n\n namespace iap = ::google::cloud::iap_v1;\n auto client = iap::IdentityAwareProxyOAuthServiceClient(\n iap::MakeIdentityAwareProxyOAuthServiceConnection());\n\n google::cloud::iap::v1::ListBrandsRequest request;\n request.set_parent(google::cloud::Project(argv[1]).FullName());\n // ListBrands is not paginated, a single response includes all the \"brands\".\n auto response = client.ListBrands(request);\n if (!response) throw std::move(response).status();\n std::cout \u003c\u003c response-\u003eDebugString() \u003c\u003c \"\\n\";\n\n return 0;\n } catch (google::cloud::Status const& status) {\n std::cerr \u003c\u003c \"google::cloud::Status thrown: \" \u003c\u003c status \u003c\u003c \"\\n\";\n return 1;\n }\n\n### Main classes\n\nThis library offers multiple `*Client` classes, which are listed below. Each one of these classes exposes all the RPCs for a gRPC `service` as member functions of the class. This library groups multiple gRPC services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.\n\nThe library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the `*Client` classes when testing your application.\n\n- [`iap_v1::IdentityAwareProxyAdminServiceClient`](/cpp/docs/reference/iap/2.12.0/classgoogle_1_1cloud_1_1iap__v1_1_1IdentityAwareProxyAdminServiceClient)\n- [`iap_v1::IdentityAwareProxyOAuthServiceClient`](/cpp/docs/reference/iap/2.12.0/classgoogle_1_1cloud_1_1iap__v1_1_1IdentityAwareProxyOAuthServiceClient)\n\n### Retry, Backoff, and Idempotency Policies.\n\nThe library automatically retries requests that fail with transient errors, and uses [exponential backoff](https://en.wikipedia.org/wiki/Exponential_backoff) to backoff between retries. Application developers can override the default policies.\n\n### More Information\n\n- [Error Handling](https://cloud.google.com/cpp/docs/reference/common/latest/common-error-handling.html) - describes how the library reports errors.\n- [How to Override the Default Endpoint](/cpp/docs/reference/iap/2.12.0/iap-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/iap/2.12.0/iap-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Environment Variables](/cpp/docs/reference/iap/2.12.0/iap-env) - describes environment variables that can configure the behavior of the library."]]